How do I get past level 3?

So, my son and I are on level three and it is saying for us to perch on the platform of blue and I have no idea what that means. We have put Mario on that platform but nothing happens. We need help so we can get past this level.

Top Voted Answer

There is a hidden podium that tells you what to do when you are on the blue platform. It says to press the "1" button and the "-" button at the same time. If you do this while standing on the blue platform the Star Block to reveal itself.